Apparatus for making plug bricks



1945- J. B. BLEWETT I 2,369,102

APPARATUS FOR MAKING PLUG BRICKS I Filed July 22, 1943 2 Sheets-Sheet 1 JOI/NBBZEWETF Feb. 6, 1945. .1. B. BLEWETT 2,369,102

APPARATUS FOR MAKING PLUG BRICKS Filed July 22, 1943 2 Sheets-Sheet 2 j 'yg4 jwuc/nfm JOHN 5.5L EWETT Patented Feb. 6, 1945 UNITED STATES PATIENT" OFFICE John B. Blewett, Wellsville, Ohio, assignor to The McLain Fire Brick Company, Pittsburgh, Pa., a corporation of Delaware j Application July 22, 1943, Serial No. 495,725

7 Claims. (01. 2 -44) The present invention relates to an apparatus for the manufacture of plug bricks with an expanded hole.

The primary object of the invention is to provide an attachment for a plug brick machine having a spinner head, which attachment is adapted to be carried by the head to form an opening centrally of the plug brick terminating in an interior enlarged opening.

A further object of the invention is to provide suitable apparatus for forming plug bricks used in connection with ingot molds so that When the molten metal is poured in the mold, a portion of the metal will flow into the enlarged cavity in the plug brick and anchor the same to the bottom of the ingot.

A still further object of the invention is to provide an apparatus which may be easily attached to the spinner head of an ingotmold plug brick forming machine Without requiring excessive alterations to the mold or to the spinner press head. I

A still further object of the invention is to provide an attachment for an ingot mold plug brick machine which i enttir'ely automatic in operation and requires 'very little manual attention such as for the purpose of making adjustments toincrease the depth of the opening in the center of the plug brick. I Other objects and advantages" of the invention will become apparent during the course of the following description of the accompanying drawings wherein:

Figure 1 is a top plan view of the attachment embodying the invention, 2

Figure 2 is a side elevational view of the same showing the manner in which the presserhe'ad is carried by the attaching supporting member,

Figure 3 is a vertical cross sectional View taken at right angles to Figure 2, showing in detail the pivoted former and the mode of its operation,

Figure 4 is a side elevational view of the attachment showing the presser head in its compressed position for laterally moving the former after it has been projected into the plug brink,

Figure 5 is a vertical cross sectional viewtaken at right angles to Figure 4, illustrating the former in its operative position with respect to the plug brick,

Figure 6 is a top plan view of the plug brick formed in the apparatus, and

Figure 7 is a fragmentary side elevational view of the finished ingot mold plug brick illustrating the shape of the central opening formed therein. In the drawings, wherein for the purpose of theupper surface of the mass l 2 illustrating the invention and wherein like reference'characters will be employed to designate likeparts throughout the same, the reference character ID will generally be employed to designate one of the mold cavities of a plug brick machine which may be mounted on a turn-table and be provided with suitable mechanism for raising and loweringthe mold members H) as they reach predetermined stations. comprises a spinner head which is'rotated so that when the'mold cavity [0 and plastic refractory material 12 is raised into engagement therewith, will be smoothed and devoid of any flaws.

A'botto'm wall I4 is usually provided for the mold members l0 and is of circular shape to fit Within the bottom thereof. Y

The invention comprises a carrier l6 having a circular boss l8 formed on the top thereof which is adapted to be attached as by means of machine screws suitablycarried by the spinner head (not shown) threaded in the openings of the circular boss 18.1 The carrier Hi 'is circular and is provided adjacent its periphery with a. series of bolts 22 having heads 24 to limit the downward movement of the bolts 22 with respect to the carrier l6.

Supported by the lower ends of the bolts 22 is a circular presser plate 25 having openings through which the threaded ends'28 of 'the bolts 22 extend so that nuts may be threaded thereon and prevent displacement of the presser plate. Mounted on each of the bolts 22 between the carrier l6 and presser plate 26 is a coil spring 32 which is adapted to be compressed when the presser plate 2 B is moved upwardly when engaged by the upper edge of the mold member ID.

Formed in the circular boss I8 is a diametrically arranged cavity 34 which is adapted to house the upper end of a former bar 36 pivoted to the presser plate 26 by means of a pivot pin 38 extending through oppositelyarranged angle brackets 40 secured in place on opposite sides of an elongated slot 42 formed centrally with respect to the presser plate 26. It is noted that the former bar 36 projects downwardly through said opening and operates in a bifurcated plunger 44 which is secured to the underside of the presser plate 26 as by means of welding or the like.

The upper end of the former rod 36 projects through a slot 46 in the carrier head l6 and terminates within the cavity 34. Attached to opposite sides of the slot 46 is a pair of angle brackets 48 arranged in opposed relation adapted to receive a guide pin 50 operating in a diag One of such stations gaged by "the mold member In during its upward travel.

In operation, the mold cavity members ID are stopped on their turn-table to receivev a mass of plastic refractory material I2 which is then moved .15 mold cavity member I is automatically ,raisedif' so that the plunger 44 and lower end of the former bar 36 will enter the mass l2 and produce a central opening 62 therein as shown in the finjto a position under the carrier I 6 whereuponthe' ished article in Figures 6 and 7.

' Upon continued upward travel ofthe mold cav ity member Ill, the presser head 26: is 'moved upwardly againstv the action of the coil springsv 32,

whereby the former bar 36 will be raised with respect to the rotating carrier 16 so that the pin 50 will. operate in the cam slot 52 .to tilt the lower end of the former bar 36 to cause the collar 56' to enlarge the opening 62 as at 64 as shown'in Figures 6 and 7.

When the mold cavity member ID moves down- 36 is slightly adapted to be attached to a spinner head, a

presser plate resiliently supported by the carrier,

' and a pivoted former lever carried by the presser plate andadapted to be tilted upon relative movement between the presser plate and carrier to form an offset opening in the material being molded. 1

l. For use with a plug brick; mold a carrier adapted to be attached to a spinner head, a

presser plateadapted to be engaged by the upward travel of the mold, a former bar pivoted to the presser plate and having an end extending into the mold, and cam means carried by the carrier for tilting the former bar upon. relative I rier.

wardly and away from the presser plate 26, the

former bar 36 will return to its perpendicular position, whereby the collar 56 will be 'within the confines of the tubular bifurcated plunger 44 thereby allowing the continued lowering of the mold, cavity member Ill until the plunger 44 and lower end 54 of the former bar 36 are withdrawn from the plastic mass l2 through the restricted opening 62 therein.

It is to be understood that the form. of the vention herewith shown and described is'to be taken as a preferred embodiment of the same and that various changes in the shape, size and arrangement 'ofparts may be resorted to without departing from the. spirit of the invention the scope-of the subjoined claims- What is claimed is:

1. For use with a plugbrick mold, a carrier adapted to be supported by a spinner head, a

presser plate adapted to be engaged by the mold,

andv a former plunger pivoted to the presser plate and adapted to form an ofiset cavity in the materialcarried by the mold.

2; For use with a plug brick mold, a carrier adapted toxbe attached to) a spinner head, a presseriplate' resiliently supported by th carrier and adapted to be engaged by the mold, and a cam operated lever extending through the carrier and pivoted to the presser plate and adapted to form 'an offset opening in the material inthe mold. 7

' 3. For use with a plug brick mold, a carrier 5. For use with a plug brick mold, a carrier adapted to be attached to a spinner head, a

presser plate resiliently suspended from the carrier and adapted to be engaged by the mold, a former lever pivoted to the presserplate'and having itslower end extending into the mold cavity and its upper end'projecting through 'a slot in the carrier, a pin and slot connecting between the upper end of the former lever and the carrier to rock the lever upon relativ movement between the presser plate and carrier, and a collar attached to the lower end of the said former lever and adapted to form an enlarged cavity in the material being molded. V 1

6. For use with a plug brick mold, a carrier adapted to be attached to a spinner head, a presser plate resiliently suspended from the carrier and adapted to be engaged by the mold,'a former lever pivoted to the presserplate andhaving its lower end extending therethrough and into the mold cavity, and having its upper end projecting through a slot in the carrier, a pin and slot connection between the former lever and the,

end of the former lever and adapted to produce 7 an enlarged cavity in'the material being molded. 7. For use with a plug brick mold, a circular carrier adapted to be attached to a spinner head,

a presser plate slidably supported by-the carrier and adapted to be engaged by the mold, spring means for holding the presser plate away from thecarrier, a bifurcated plunger mounted on the lower side of the presser plate, aformer lever pivoted to the presser plate and extending through an opening therein and between the legs of thebifurcated plunger, a former collar located on the lower end of the said former lever. and adaptedto produce an enlarged opening in the material being molded when the former lever is rocked by. the upward travel of the presser plate. r w

JOHN B. BLEWET'I'. 

